Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Per Share data, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013
Statement of Financial Position [Abstract]
Accounts receivable, allowances	$ 4,958	$ 3,259
Preferred stock, par value (USD per share)	$ 0	$ 0
Preferred stock, shares authorized	10,000	10,000
Preferred stock, shares outstanding	0	0
Common stock, par value (USD per share)	$ 0	$ 0
Common stock, shares authorized	200,000	200,000
Common stock, shares issued	73,390	78,090
Common stock, shares outstanding	73,390	78,090